Method for removing from an image the background surrounding a selected object
US6134346A · kind A · utility
Inventors
Key dates
| Filing date | Jan 16, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Jan 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A computer implemented method to extract a selected subject from its background, by removing the background, including that portion of the background visible through semi transparent areas of the subject, and generating a matte signal containing a record of background levels outside of and within semitransparent subject areas. The observed RGB signal levels of a pixel in the semitransparent transition between a subject and its background, are a mixture of color contributed by the subject, and by the background. The estimated subject color, and the estimated background color, and the observed color of a transition pixel (pixRGB), may be shown as three points in a three dimensional color space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.